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<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> *    Copyright 2009 Simone Tripodi</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *    Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *    you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> *    You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *       <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *    Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> *    distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> *    See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> *    limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> com.memos2;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.beans.BeanInfo;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.beans.IntrospectionException;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.beans.Introspector;
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.beans.PropertyDescriptor;
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Method;
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.HashMap;
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a name="25" href="#25">25</a>  
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> com.opensymphony.oscache.base.Config;
<a name="27" href="#27">27</a>  
<a name="28" href="#28">28</a>  <em class="jxr_javadoccomment">/**</em>
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> * Converts a keyed property string in the OSCache Config to a proper Java</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> * object representation.</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> *</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * @author Simone Tripodi (simone.tripodi)</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * @version $Id: AbstractPropertySetter.java 85 2009-12-15 09:10:28Z simone.tripodi $</em>
<a name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * @param &lt;T&gt;</em>
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> */</em>
<a name="36" href="#36">36</a>  <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> AbstractPropertySetter&lt;T&gt; {
<a name="37" href="#37">37</a>  
<a name="38" href="#38">38</a>      <em class="jxr_javadoccomment">/**</em>
<a name="39" href="#39">39</a>  <em class="jxr_javadoccomment">     * 'propertyName'='writermethod' index of {@link MemcachedConfiguration}</em>
<a name="40" href="#40">40</a>  <em class="jxr_javadoccomment">     * properties.</em>
<a name="41" href="#41">41</a>  <em class="jxr_javadoccomment">     */</em>
<a name="42" href="#42">42</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Map&lt;String, Method&gt; WRITERS = <strong class="jxr_keyword">new</strong> HashMap&lt;String, Method&gt;();
<a name="43" href="#43">43</a>  
<a name="44" href="#44">44</a>      <strong class="jxr_keyword">static</strong> {
<a name="45" href="#45">45</a>          <strong class="jxr_keyword">try</strong> {
<a name="46" href="#46">46</a>              BeanInfo memcachedConfigInfo = Introspector.getBeanInfo(MemcachedConfiguration.<strong class="jxr_keyword">class</strong>);
<a name="47" href="#47">47</a>              <strong class="jxr_keyword">for</strong> (PropertyDescriptor descriptor : memcachedConfigInfo.getPropertyDescriptors()) {
<a name="48" href="#48">48</a>                  WRITERS.put(descriptor.getName(), descriptor.getWriteMethod());
<a name="49" href="#49">49</a>              }
<a name="50" href="#50">50</a>          } <strong class="jxr_keyword">catch</strong> (IntrospectionException e) {
<a name="51" href="#51">51</a>              <em class="jxr_comment">// handle quietly</em>
<a name="52" href="#52">52</a>          }
<a name="53" href="#53">53</a>      }
<a name="54" href="#54">54</a>  
<a name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em>
<a name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * The OSCache Config property key.</em>
<a name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     */</em>
<a name="58" href="#58">58</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String propertyKey;
<a name="59" href="#59">59</a>  
<a name="60" href="#60">60</a>      <em class="jxr_javadoccomment">/**</em>
<a name="61" href="#61">61</a>  <em class="jxr_javadoccomment">     * The {@link MemcachedConfiguration} property name.</em>
<a name="62" href="#62">62</a>  <em class="jxr_javadoccomment">     */</em>
<a name="63" href="#63">63</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String propertyName;
<a name="64" href="#64">64</a>  
<a name="65" href="#65">65</a>      <em class="jxr_javadoccomment">/**</em>
<a name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     * The {@link MemcachedConfiguration} property method writer.</em>
<a name="67" href="#67">67</a>  <em class="jxr_javadoccomment">     */</em>
<a name="68" href="#68">68</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Method propertyWriterMethod;
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <em class="jxr_javadoccomment">/**</em>
<a name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     * The default value used if something goes wrong during the conversion or</em>
<a name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     * the property is not set in the OSCache config.</em>
<a name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     */</em>
<a name="74" href="#74">74</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> T defaultValue;
<a name="75" href="#75">75</a>  
<a name="76" href="#76">76</a>      <em class="jxr_javadoccomment">/**</em>
<a name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * Build a new property setter.</em>
<a name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     *</em>
<a name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     * @param propertyKey the OSCache Config property key.</em>
<a name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * @param propertyName the {@link MemcachedConfiguration} property name.</em>
<a name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * @param defaultValue the property default value.</em>
<a name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     */</em>
<a name="83" href="#83">83</a>      <strong class="jxr_keyword">public</strong> <a href="../../com/memos2/AbstractPropertySetter.html">AbstractPropertySetter</a>(<strong class="jxr_keyword">final</strong> String propertyKey, <strong class="jxr_keyword">final</strong> String propertyName, <strong class="jxr_keyword">final</strong> T defaultValue) {
<a name="84" href="#84">84</a>          <strong class="jxr_keyword">this</strong>.propertyKey = propertyKey;
<a name="85" href="#85">85</a>          <strong class="jxr_keyword">this</strong>.propertyName = propertyName;
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>          <strong class="jxr_keyword">this</strong>.propertyWriterMethod = WRITERS.get(propertyName);
<a name="88" href="#88">88</a>          <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.propertyWriterMethod == <strong class="jxr_keyword">null</strong>) {
<a name="89" href="#89">89</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(<span class="jxr_string">"Class '"</span>
<a name="90" href="#90">90</a>                      + MemcachedConfiguration.<strong class="jxr_keyword">class</strong>.getName()
<a name="91" href="#91">91</a>                      + <span class="jxr_string">"' doesn't contain a property '"</span>
<a name="92" href="#92">92</a>                      + propertyName
<a name="93" href="#93">93</a>                      + <span class="jxr_string">"'"</span>);
<a name="94" href="#94">94</a>          }
<a name="95" href="#95">95</a>  
<a name="96" href="#96">96</a>          <strong class="jxr_keyword">this</strong>.defaultValue = defaultValue;
<a name="97" href="#97">97</a>      }
<a name="98" href="#98">98</a>  
<a name="99" href="#99">99</a>      <em class="jxr_javadoccomment">/**</em>
<a name="100" href="#100">100</a> <em class="jxr_javadoccomment">     * Extract a property from the OSCache, converts and puts it to the</em>
<a name="101" href="#101">101</a> <em class="jxr_javadoccomment">     * {@link MemcachedConfiguration}.</em>
<a name="102" href="#102">102</a> <em class="jxr_javadoccomment">     *</em>
<a name="103" href="#103">103</a> <em class="jxr_javadoccomment">     * @param config the OSCache Config</em>
<a name="104" href="#104">104</a> <em class="jxr_javadoccomment">     * @param memcachedConfiguration the {@link MemcachedConfiguration}</em>
<a name="105" href="#105">105</a> <em class="jxr_javadoccomment">     */</em>
<a name="106" href="#106">106</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">void</strong> set(Config config, <a href="../../com/memos2/MemcachedConfiguration.html">MemcachedConfiguration</a> memcachedConfiguration) {
<a name="107" href="#107">107</a>         String propertyValue = config.getProperty(<strong class="jxr_keyword">this</strong>.propertyKey);
<a name="108" href="#108">108</a>         T value;
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>         <strong class="jxr_keyword">try</strong> {
<a name="111" href="#111">111</a>             value = <strong class="jxr_keyword">this</strong>.convert(propertyValue);
<a name="112" href="#112">112</a>             <strong class="jxr_keyword">if</strong> (value == <strong class="jxr_keyword">null</strong>) {
<a name="113" href="#113">113</a>                 value = <strong class="jxr_keyword">this</strong>.defaultValue;
<a name="114" href="#114">114</a>             }
<a name="115" href="#115">115</a>         } <strong class="jxr_keyword">catch</strong> (Throwable e) {
<a name="116" href="#116">116</a>             value = <strong class="jxr_keyword">this</strong>.defaultValue;
<a name="117" href="#117">117</a>         }
<a name="118" href="#118">118</a> 
<a name="119" href="#119">119</a>         <strong class="jxr_keyword">try</strong> {
<a name="120" href="#120">120</a>             <strong class="jxr_keyword">this</strong>.propertyWriterMethod.invoke(memcachedConfiguration, value);
<a name="121" href="#121">121</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="122" href="#122">122</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(<span class="jxr_string">"Impossible to set property '"</span>
<a name="123" href="#123">123</a>                     + <strong class="jxr_keyword">this</strong>.propertyName
<a name="124" href="#124">124</a>                     + <span class="jxr_string">"' with value '"</span>
<a name="125" href="#125">125</a>                     + value
<a name="126" href="#126">126</a>                     + <span class="jxr_string">"', extracted from ('"</span>
<a name="127" href="#127">127</a>                     + <strong class="jxr_keyword">this</strong>.propertyKey
<a name="128" href="#128">128</a>                     + <span class="jxr_string">"'="</span>
<a name="129" href="#129">129</a>                     + propertyValue
<a name="130" href="#130">130</a>                     + <span class="jxr_string">")"</span>, e);
<a name="131" href="#131">131</a>         }
<a name="132" href="#132">132</a>     }
<a name="133" href="#133">133</a> 
<a name="134" href="#134">134</a>     <em class="jxr_javadoccomment">/**</em>
<a name="135" href="#135">135</a> <em class="jxr_javadoccomment">     * Convert a string representation to a proper Java Object.</em>
<a name="136" href="#136">136</a> <em class="jxr_javadoccomment">     *</em>
<a name="137" href="#137">137</a> <em class="jxr_javadoccomment">     * @param value the value has to be converted.</em>
<a name="138" href="#138">138</a> <em class="jxr_javadoccomment">     * @return the converted value.</em>
<a name="139" href="#139">139</a> <em class="jxr_javadoccomment">     * @throws Throwable if any error occurs.</em>
<a name="140" href="#140">140</a> <em class="jxr_javadoccomment">     */</em>
<a name="141" href="#141">141</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> T convert(String value) <strong class="jxr_keyword">throws</strong> Throwable;
<a name="142" href="#142">142</a> 
<a name="143" href="#143">143</a> }
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